Yamaha F100B F100C Outboards Factory Service Manual, Page 140Get this manual
Power unit
3Select the suitable color for the main bearing from the table(#1) (#2) (#3) (#4) (#5)
Crankcase bolt (M10): 1st: 19 Nm (1.9 kgfm, 14 ftlb) 2nd: 60 Crankcase bolt (M8): 1st: 14 Nm (1.4 kgfm, 10 ftlb) 2nd: 28 Nm (2.8 kgfm, 20 ftlb)
8Remove the crankcase and measure the width of the compressed Plastigauge (PG-1) on each main journalReplace the main bearing if out of specification#1 #2 #3 #4 #5
Selecting the crankshaft main journal bearing
1When replacing the main bearing, select the suitable bearing as follows2Check the crankshaft journal mark on the crankshaft and the cylinder body mark on the cylinder body 2S60C5A60